Recommendations on areas to stay for a newcomer :) (Berlin)

Have used the Internations network to quite good effect for this before so thought I'd try my luck yet again :)

I am moving to Berlin on Feb 20 and was looking for places to live.Accommodation for about Protected content would be ideal so I can get a feel of the place and find a longer term rental once I know where I want to live.

I am looking for a decent night life but cheap options. I am looking to start my own business (finally!) and will have to live an entrepreneurs frugal life :)

Am fairly social and love meeting people, but would also like to stay near the tech start-up scene (where IS Silicon Allee?! Sankt Oberholz?) Let me know which areas I should be looking at when any of you have a few minutes to spare.

Anyone who has accommodation which might be good for me, feel free to pm!